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A method of comparative studies on checkup sets to evaluate the technical condition of tractors

In this paper the authors propose an original method of the numerical evaluation of checkup sets for the technical condition of an agricultural tractor. Information entropy required in diagnostic tests for a specific checkup set was used as the evaluation criterion. A formal description is given for the technical condition diagnostics of a tractor in its operation period, which is characterised by a high rate of average damage. The structural model was constructed using information entropy. This model accumulates the number of checkups, probability of specific damage types and assigns them a common numerical measure. The conducted logic analysis of the proposed method and the results obtained in experiments on its practical applicability in service stations indicate that the method adequately describes this area of machine operation and thus may be a measure of information effectiveness for checkup sets determining the machine technical condition.